1. Time to disintegrate

2. the duration of the pulse

3. to be encountered

4. in just a fraction of a second

1. One more present-day complicated problem to be solved is that of combining laser and thermonuclear reaction to produce a practically limitless source of energy. 2. A Japanese company is planning to install several more electronic devices on the car in­strument panel. 3. The Voice Warning System is one more elec­tronic device. 4. If you make half-hour breaks while getting ready for your exams, your brain will work much more efficiently.

1Students asked the lecturer many questions. The lecturer was asked many questions. 2. The monitor told the first-year students to come to the laboratory. The first-year students were told to come to the laboratory. 3. Usually a lab assistant shows the equipment to the students. Usually the equipment is shown to the students by a lab assistant. Usually students are shown the equipment by a lab as­sistant. 4. Students watched the process with great attention. The process was watched with great attention. 5. Tomorrow our teacher

2Cambridge University was formed in the 12th century. 2. The solution of ecological problems may be achieved only by joint efforts of all countries. 3. Great changes in people’s lives and work were brought about by the scientific and technological progress. 4. The theory of interaction of atmospheric and oceanic processes is being developed to determine the weather of the planet. 5. The teachers at Cambridge are called «dons» or «tutors». 6. Computers and la-

3That electricity is clean and easily-regulated is its great ad­vantage. 2. The important fact is that electricity offers improved service at reduced cost. 3. That the two scientists Lodygyn and Yablochkov were the first in Russia to work in the field of electrical engineering is well-known. 4. One of the main advantages of elec­tricity is that it does not pollute the environment. 5. The indicator of nation development is how much electricity is consumed per ca­pita. 6. What has been and is being done in environment protection cannot be measured by yesterday’s standards.

4when the mass production of TV sets began, people realized they wanted to have a TV set at home. 4. Experiments proved that elec­

5tricity could travel instantly over a long piece of wire. 5. Can you

6tell me whether satellites are used for telephone communication?

7It became clear television had a great influence on people’s life.

8 Flying from Los Angeles to Tokyo on board a new supersonic craft will take two hours. 2. On examining the car before starting on a long journey a driver can be sure that he will get to his destination without accidents. 3. By summing up the information about the speed and distance of various objects on the road, the computer de-

9 If a scientific research is closely linked with practice, the re­sults are always good. 2. If you looked at the equipment of 1946,

10 Laser means «light amplification by stimulated emission of radiation». 2. Laser produces an intensive beam of light. 3. In the next few years laser will become one of the main technological tools. 4. Martians almost invaded the Earth before the turn of the last century. 5. Laser and thermonuclear reaction can produce a limited source of energy. 6. The laser beam heats the fuel so quickly that the plasma disintegrates. 7. There are projects to transform lu-